itkStatisticsImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkStatisticsImageFilter_h
#define __itkStatisticsImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkNumericTraits.h"
#include "itkArray.h"
#include "itkSimpleDataObjectDecorator.h"

namespace itk
{
template< typename TInputImage >
class StatisticsImageFilter:
  public ImageToImageFilter< TInputImage, TInputImage >
{
public:
  typedef StatisticsImageFilter                          Self;
  typedef ImageToImageFilter< TInputImage, TInputImage > Superclass;
  typedef SmartPointer< Self >                           Pointer;
  typedef SmartPointer< const Self >                     ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(StatisticsImageFilter, ImageToImageFilter);

  typedef typename TInputImage::Pointer InputImagePointer;

  typedef typename TInputImage::RegionType RegionType;
  typedef typename TInputImage::SizeType   SizeType;
  typedef typename TInputImage::IndexType  IndexType;
  typedef typename TInputImage::PixelType  PixelType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

  typedef typename NumericTraits< PixelType >::RealType RealType;

  typedef typename DataObject::Pointer DataObjectPointer;

  typedef SimpleDataObjectDecorator< RealType >  RealObjectType;
  typedef SimpleDataObjectDecorator< PixelType > PixelObjectType;

  PixelType GetMinimum() const
  { return this->GetMinimumOutput()->Get(); }
  PixelObjectType * GetMinimumOutput();

  const PixelObjectType * GetMinimumOutput() const;

  PixelType GetMaximum() const
  { return this->GetMaximumOutput()->Get(); }
  PixelObjectType * GetMaximumOutput();

  const PixelObjectType * GetMaximumOutput() const;

  RealType GetMean() const
  { return this->GetMeanOutput()->Get(); }
  RealObjectType * GetMeanOutput();

  const RealObjectType * GetMeanOutput() const;

  RealType GetSigma() const
  { return this->GetSigmaOutput()->Get(); }
  RealObjectType * GetSigmaOutput();

  const RealObjectType * GetSigmaOutput() const;

  RealType GetVariance() const
  { return this->GetVarianceOutput()->Get(); }
  RealObjectType * GetVarianceOutput();

  const RealObjectType * GetVarianceOutput() const;

  RealType GetSum() const
  { return this->GetSumOutput()->Get(); }
  RealObjectType * GetSumOutput();

  const RealObjectType * GetSumOutput() const;

  typedef ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
  using Superclass::MakeOutput;
  virtual DataObjectPointer MakeOutput(DataObjectPointerArraySizeType idx);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( InputHasNumericTraitsCheck,
                   ( Concept::HasNumericTraits< PixelType > ) );
  // End concept checking
#endif

protected:
  StatisticsImageFilter();
  ~StatisticsImageFilter(){}
  void PrintSelf(std::ostream & os, Indent indent) const;

  void AllocateOutputs();

  void BeforeThreadedGenerateData();

  void AfterThreadedGenerateData();

  void  ThreadedGenerateData(const RegionType &
                             outputRegionForThread,
                             ThreadIdType threadId);

  // Override since the filter needs all the data for the algorithm
  void GenerateInputRequestedRegion();

  // Override since the filter produces all of its output
  void EnlargeOutputRequestedRegion(DataObject *data);

private:
  StatisticsImageFilter(const Self &); //purposely not implemented
  void operator=(const Self &);        //purposely not implemented

  Array< RealType >       m_ThreadSum;
  Array< RealType >       m_SumOfSquares;
  Array< SizeValueType >  m_Count;
  Array< PixelType >      m_ThreadMin;
  Array< PixelType >      m_ThreadMax;
}; // end of class
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkStatisticsImageFilter.hxx"
#endif

#endif